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It looks like a yawn — wide, slow, almost theatrical.
But in the Luangwa Valley, this gesture is no sign of sleepiness.
When a hippo opens its jaws to nearly 180 degrees, it’s not stretching — it’s sending a message. This is a threat display: a visual warning to rivals, intruders, or anyone who gets too close.
Those massive canines, some over 50 cm long, aren’t just for show. They’re weapons — and the open mouth is a billboard of intent.